Astragalus Root is a powerful immune builder and one of the chief herbs used for energy. It is used for such ailments as flu, colds, cancer, lack of energy, and builds white blood cells used to fight diseases.  Astragalus root has been used in traditional Chinese medicine for thousands of years. Found in energy tonics, it also helps increase the production of interferon, which helps stimulate and enhance the immune system. The herb is being reviewed by the American Cancer Society because of its positive effects on the immune system of cancer patients. Astragalus has been used to treat many different ailments including chronic fatigue syndrome, pneumonia, emphysema, chronic infection, chronic cough, uterine bleeding, chronic nephritis, and ulcers.